| 摘要 |
PURPOSE:To maintain combustion oil at an optimum pulverizing condition and to improve combustion efficiency, by a method wherein, through continuous measurement of soot concentration in the flame of a burner, the area of a nozzle is varied, and the flow rate of the air for combustion is controlled. CONSTITUTION:An injection nozzle 11 at the forward end of a burner 2 is structured so that the area of the injection nozzle is varied. Namely, through longitudinal movement in the direction an axis of a fuel oil passage 13 by means of a step motor 31, a shield plate 10, attached to the forward end of an oil nozzle 4, is moved longitudinally. A soot sensor 38 emits laser rays, and from a decrease in an amount of light entering a collecting part 39, soot concentration in a flame 30 is measured. An output signal from the soot sensor 38 is received by a regulator 40, and a signal, correcting displacement of soot concentration from a previously set value, is inputted from the regulator 40 to a regulator 34 and a flow rate regulator 20. This operates the step motor 31, causes the optimum atomizing condition of combustion oil to be maintained through variation of the area of the injection nozzle 11 at the forward end, and also controls a flow rate of the air for combustion in response thereto. |
